Aine Davis has been charged with terrorism offences in 2014 and possession of a firearm for a purpose connected with terrorism (Pictures: Rex)A man alleged to be the fourth member of the so-called Islamic State’s terror cell known as The Beatles has been charged with terror offences after returning to the UK.Aine Leslie Davis, 38, was arrested at Luton Airport on Wednesday evening after being deported to England by Turkey.He has been charged wit…